"3, s kilos...no no no, 5, 6, 7... yes, obviously" (0209-0210 UTC 25 April 2017) - these guys are speaking Spanish, not Portuguese (at least tonight they are). Lots of informal talk - one station referred to a "nigrito" (which means "little black one" - a nickname no doubt). Chatter about kilos of something. Lots of background noise in signal of one station (the stronger one) - sounds like a motor running, so these might actually be pescadores pescadores (actual fishermen).
Continued chatter after 0212 UTC. Slightly distorted signal on one of the stations. Several instances of guys whistling into their microphones and laughing.